User Constant Settings and Functions
5.6.2 Calculating the Required Capacity of Regenerative Resistors
5 -92
5.7 Absolute Encoders
If a motor with an absolute encoder is used, a system to detect the absolute position can be made in
the host controller. If such a system is to be combined with a host controller, use a Servomotor with
an absolute encoder. Consequently, operation can be performed without origin return operation im-
mediately after the power is turned ON.
MotorSGM
j
H-
jjj
1
j
···With 16-bit absolute encoder
SGM
j
H-
jjj
2
j
···With 17-bit absolute encoder
Always detects
absolute position.
Origin return operation
Absolute encoder
WARNING
!
D
The output range of multiturn data for
-
series absolute detection system differs from that for
conventional systems (15-bit encoder and 12-bit encoder). Specially when Infinite length posi-
tioning system of conventional type is to be configured with
-
series, be sure to make the
following system modification.
Absolute
Encoder Type
Output Range of
Multiturn Data
Motion When Exceeds the Limit
Conventional Types
(12-bit and 15-bit)
-99999 to +99999
S
When exceeds the upper limit (+99999) in the
positive direction, the multiturn data is 0.
S
When exceeds the lower limit (-99999) in the
negative direction, the multiturn data is 0.
-
Series
(16-bit and 17-bit)
-32768 to +32767
S
When exceeds the upper limit (+32767) in the
positive direction, the multiturn data is
-32768.
S
When exceeds the lower limit (-32768) in the
negative direction, the multiturn data is
+32767.*
*
When the multiturn limit setting (Pn205) is changed, the motion differs. Refer to
5.7.6 Multiturn Limit Setting.
5
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]